[Antennas] G5RV/inverted vee: Radiation Angles

Fri, 10 Jan 2003 21:35:09 -0700

Gosh! Golly Geee!  I guess I should go back and erase all the entries in
my log book, I guess I was imagining those QSO's.  But then again, I
don't have to prove the Beams I want to sell are the only way to go.
73's de Jerry, K�EJF

On Fri, 10 Jan 2003 20:21:21 -0500 (Eastern Standard Time) "Pastor-kc1di"
<[email protected]> writes:
> 

>  

> -------Original Message-------

>  

> From: Durwydd MacTara

> Date: Friday, January 10, 2003 7:13:13 PM

> To: [email protected]; [email protected]; [email protected]

> Subject: Re: [Antennas] G5RV/inverted vee: Radiation Angles

>  

> In other words, the instruction sheet from Antennas West "Lied" to 
> me when 

> it said that a vee configuration would work? What I wanted was 
> 20,30,40 

> omnidirectiional...

> 

> Well yes & no,  it was assumed for many years that Inverted Vees 
> would act
> like inverted Vees (nearly omni directional ) on all frequencies 
> above the
> fundamental.. when in truth any inverted vee used on a higher 
> frequency than
> the fundamental  will begin to exhibit high angel radiation which is 
> of
> course not what one normally wants for DX work.. Thus the multiband 
> use of
> an inverted vee is not the best.  here are a couple of sites you can 
> go to
> to find out more.. What they are saying closely mirriors what I 
> have
> experienced over the year with inverted Vees wheather G5RV or Zepp 
> type.

> 

> These observation have been born out in my experiences with the G5RV 
> over
> the past 20 odd years.  They work great as a flat top , Poorly as 
> and
> inverted Vee  If one is limited to space or support requirements 
> that
> mandate the use of inverted vees then you will be better off to use 
> Trap or
> paralell dipople types.  

> 

> http://www.radioworks.com/Inverted-V/InvertedV.htm

> 

> http://www.cebik.com/gup/gup30.html

>  

> 

> These Web pages explain the reasoning for not using the G5RV or 
> anyother
> Multiband Ladder line feed Inverted Vee .

> Hope this info is of some help to those who wonder why their G5RV or 
> center
> fed zepp in this configuartion is not producing the results they 
> hoped for.

> 

> 73 Dave 

> 

>  
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> 
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> 

E. J. (Jerry) Forwood
K�EJF